android - 如何使用 1 :1 ratio like Instagram? 获取 Android Camera2

Question

我的问题很简单:

How to get an Android android.hardware.Camera2 with 1:1 ratio and without deformation like Instagram?

我使用 GoogeSamples 项目进行了测试 android-Camera2Basic .但是当我以 1:1 的比例更改预览时，图像变形了。有人对此有想法吗？

Answer 1

感谢@CommonsWare。

我按照您的建议使用负边距(顶部和底部)并且有效。

为此，我只需更新 AutoFitTextureView GoogeSamples 项目 android-Camera2Basic这样:

public class AutoFitTextureView extends TextureView {

    //...
    private boolean mWithMargin = false;

    //...

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, widthMeasureSpec);
        int width = MeasureSpec.getSize(widthMeasureSpec);
        int height = MeasureSpec.getSize(heightMeasureSpec);
        int margin = (height - width) / 2;

        if(!mWithMargin) {
            mWithMargin = true;
            ViewGroup.MarginLayoutParams margins = ViewGroup.MarginLayoutParams.class.cast(getLayoutParams());
            margins.topMargin = -margin;
            margins.bottomMargin = -margin;
            margins.leftMargin = 0;
            margins.rightMargin = 0;
            setLayoutParams(margins);
        }

        if (0 == mRatioWidth || 0 == mRatioHeight) {
            setMeasuredDimension(width, height);
        } else {
            if (width < height) {
                setMeasuredDimension(width, width * mRatioHeight / mRatioWidth);
            } else {
                setMeasuredDimension(height * mRatioWidth / mRatioHeight, height);
            }
        }
    }
}